Multimolding concrete-block machine.



F. H. FOLDEN.

IVIULTINIDLDING CONCRETE BLOCK MACHINE.

APPLICATION FILED JULY 22| i916. 1,225,765, Patented May 22,1917.

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F. H. FOLDEN.

MULTIMOLDINC CONCRETE BLOCK MACHINE. APPLICATION FILED JULY 22. |916.

1,226,765. Patented' May 22, 1917.

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` F. H. FOLDEN. MULTIMOLDING CONCRETE BLOCK MACHINE.

APPLICATION FILED IuLv 22. 1916.

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R H.FOLDEN. MULTIMOLDING CONCRETE BLOCK MACHINE.

APPLICATION FILED IULY 22. I9I6.

1,226,765. Patented May 22, 1917.

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F. H. FOLDEN.

MULTIMOLDING CONCRETE BLOCK MACHINE.

APPLICATION FILED JULY 22. 1916.

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F. H. FOLDEN.

MULTIMOLDING CONCRETE BLOCK MACHINE.

' C APPLICATION FILED lULY 22.1916. 1,226,765. Patented May 22, 1917.

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i `ivIUL'rINIoLnINe CONCRETE-BLOCK MACHINE.

Specification of Letters Patent.

Patented May 22, 1917.

Application tiled July 22, 1916. Serial No. 110,718.

To all whom t may concern:

Be it known that l'. FRANK H. FoLDnN,

machine ior delivery of the molded blocks.`

A further object of this invention is lto provide an improved construction and ar `rangementto etlect side delivery of the molded blocks.

A further object of this invention is to provide improved means for withdrawing 'the cores in the operation ot opening the machine.

A further object of this invention is to provide improved means for withdrawing the cores independently of the opening of the machine. i

A further object ot this invention is to provide improved ineans for pivotally mounting and actuating the mold heads.

.il Jfurther object ot' this invention is to provide means for separating the mold heads prior to` pivotal movement of the block-carrying mold members, in the opening operation. y

A :further object yof this invention is to provide improved means for mounting the cores. i. .y

A further object of this invention is to provide improved'construction and mounting for the core-carrying trames.

A. furtherobject of this invention is to provide improved means for mounting and inaniy'iulating aftranster pallet.

A. further objectof this invention is to provide an improved supporting bracket for the tace platesfor.y use in molding slabs of varying thickness, or brick.

A. further object of this invention is to provide improved separating plates and frame for use with the mold `in making brick. i

A. further object of this invention is to provide improved 'form of master pallet for use with the transfer devices in making divided blocks or brick.

My invention consists in the construction, Y arrangement andy combination ot elements hereinafter set forth, pointed out in my claims and illustrated by the accompanying drawing, in which f Figure 1 is an end elevation of the machine, dottedl lines indicating positions assumed by various parts when the machine is open. F ig.j 2'is an end elevation of the machine opposite to Fig. 1. Fig. 3 is a vertical section of the machine in the same plane as Figs. 1 and 2. Fig. 4 is a plan of the machine. Fig. 5 is a side elevation of the machine. Fig. 6 is a side elevation of Vthe machine opposite to Fig. 5, various parts being shown open and occupying the posiltion when the' machine is partially opened. F ig. 7 is an end' elevation of one of the tubular cores used in the machine. Fig. 8 is a longitudinal section of the tubular core, which also is shown attached to a part of its supporting frame. Fig. 9 is a detail view of `a connecting rod employed with the corecarrying trame. `Fi 10 is an end elevation and Fig. 11 a plan of the core-carrying frame and means for supporting the same,

together with an auxiliary device adaptedy to retain a transfer pallet. Fig. 11 also shows core plates for making divided blocks. Fig. 12 is an enlarged detail view ot'means 'for supporting a 'transfer pallet holder. Fig. 13 is an enlarged detail view of a part of one of the transiter pallet holders. Fig. Mis a plan and Fig. 15 an end elevation of acore frame and core plate adapted to be used in making brick.v Fig.,16 is an elevation ot a pallet or stripping plate adapted to ybe used, with the transfer devices, in making brick. Fig. 17 is aQface view of a spacing bracket adapted to'be used to sup- 'y port a face plate in spaced relations to its bed, such asin making brick, or blocks or slabs of varying thickness, said bracket varying in thickness according to 'the degree of spacing required. Fig. 18 is a side elevation of the bracket shown in'Fig. 17, together with a 'l'ace plate thereon. Fig. 19 is a face view and Fig. 2O an end view of a face plate. Fig. 21 is tace view of thev face plate used in making brick, grooves being shown :tor guiding and steadying the core blades or dividing plates 4(Figs. 14 and 15). Fig. 22 is an end view and Fig. 9.3 an outer face view of an end plate used in the mold, half cores shown in other views being omitted, in this instance. Fig. 24 is an inner face view of al mold head. portions of operating levers being broken away.

rEh'is view shows slots adapted to receive lugs on the end platesl shown in Figs. 22 and 23. Fig. 25 is an edge View of a face plate shown in Figs. 19 and 20. Fig. 26 is i a face elevation of a movable partition or center board employed to separate identical mold compartments. Fig. 27 is an outer face view, Fig. 28 an end elevation, and Fig. 29 an inner face view, of a master pallet or stripping plate employed in molding fractional blocks. Figs. 30 and 31 are inner face views of special forms of face plates which may be used, showing different forms of designs to be communicated t0 the molded blocks.

In the construction of the machine as shown the numerals 30, 31 designate machine heads supported on legs 32 and connected by rods 33 at their upper ends, and also adjacent the lower ends of said legs.

kA rock shaft 34 is mounted longitudinally of the machine and journaled in bearings formed in the lower portions of the machine heads 30, 31, and said shaft projects beyond the head 30 and is provided with an operating handle or lever 35. Mold heads 36, 37.

are mounted above the machine heads 30,

` 31 and operating levers 38, 38, two for each of said mold heads, are provided and are formed integrally on the outer faces thereof and project downwardly therefrom. The operating levers 38 are pivoted, just below the tops of the machine heads 30, 31, to lugs 39 formed on the outer faces of said machine heads. The operating levers 38 are curved or bent inwardly and pass through slots 40 formedvinjthe machine heads 30, 31 and the lower ends of the operating levers of each mold head 36, 37 preferably are bent, curved 0r offset toward each other, extending at their lowerends nearly to the bottom of the legs 32.

Quadrant gears 41, 42 are mounted on and fixed to the shaft 34 adjacent the inner faces of the machine heads 30, 31 and, when the machine is closed, occupy positions on the outer side. of said shaft, or away from the center of the machine. A quadrant gear 43 is fixed to the center of the shaft 34 and, when the inner side of said the machine is closed, occupies a position on shaft, orl in the direction of the median line of the machine.

A center board or mold back plate 44 is mounted forvertical movement in the central portion of the machine between the mold heads 36, 37, and when the machine is closed is contacted at its ends by central portions of said mold heads. The center board 44 is formed at its ends with integral, downwardly extending arms 45, shown in detail in Fig. 26, and said arms in their lower p0rtions are formed as toothed racks 46. An

integral cross-bar 47 connects the racks 46V -at a point approximately midway between the bottom of the center. board 44 and the lower ends of said racks, and said cross-bar is formed in its center with a notch or slide bearing 48, to which considerable vertical dimension is given by the provision of spaced fingers 49 formed on and extending upwardly from said cross-bar on opposite sides of said notch.

Rods 50, 51 are mounted through and connect the lower ends of each pair of operating levers 38, and forked toggle arms 52, 53 are connected at their outer ends to said rods, respectively, and at their inner ends are pivotally connected by a bolt 54. A rack 55 is vertically mounted and secured at its lower end by the bolt 54', extends upwardly through the slide bearing formed by the notch 48 and fingers 49, and meshes with and is adapted to be reciprocated by the central quadrant gear 43, said rack lying between said quadrant gear and the body of the cross-bar 47. Oscillation of the rock shaft 34 causes a rocking of the quadrant operating levers and of the mold heads 36,

37, to approximately the positions shown in Fig. 6. n

Bell-crank brackets 56, 57 are fulcrumed on an upper cross-rod 33 at one side of the machine, being spaced apart and located just insidefthetmachine heads 30, 31; and other ybell-crank brackets 58, 59 are similarly fulcrumed and oppositely arranged at the opposite side of the machine. The bellcrank brackets 56, 57, 58, 59 are identical in construction, each having an upwardly extending or vertical arm and a horizontal arm extending from the base of said vertical arm transversely toward the center of the machine; and each bell-crank also is formed with a horizontal outward extension 60 integrally formed and extending outwardly in a direction opposite to above mentioned, and at a point approximately midway between the fulcrum and upper end of the vertical arm. The inner ends of the horizontal arms of the bell-crank brackets are pivotally connected by `links 61 to the downwardly extending arms 45 of the center board 44, lugs 62 (Fig. 26) being formed on said arms to receive the pivotal connectlon of said links. It will readily be seen that an upward movement of the center board 44, as previously described, will result in an outward oscillation of the bell-crank brackets 56 to 59 inclusive, and a downward movement, through arcs, of the outer ends of the horizontal extensions 60.

Shafts 63, 64 are journaled for rotation the horizontal arm` in the outer ends of the horizontal exten- 13o 'i `64. Outer end portions of each set 56-57 sions 60 of the bell-crank brackets 5(3*57 and 58--59 respectively, and each ofsaid shafts is provided on one end with a crank, 65 and 66, for manual. operation to rotate the shaft. Pinions 67, 68 are fixed to pro jecting ends of theshafts 63, 64, outside of v the horizontal extensions 60 of the bellcrank brackets 56, 58, and said pinions are adapted to be engaged vby arcuate racks 69, 70 respectively, fixed to and projecting laterally from opposite sides of the lower portion of the machine head 30. Such engagement of the pinions67, 68 with the arcuate racks 69, 70 occurs during pivotal movement of the bell-crank brackets, and has the effect of rotating` they shafts 63, 641 for a purpose hereinafter to be described.

A core-carrying frame is mounted be tween each pair of bellcrank brackets 56- 57 and 58-59, and each of said corelcarrying frames comprises a transverse cross head 71 having spaced vertical arms 72 on its inner face, to which` the cores are removably and replaceably secured; and also having racks 73, 74 fixed to its ends and eX- tending outwardly 'contiguous to` the. adjacent bell-crank bracket. The racks 73, 74 facey downwardly and mesh with andare adapted to be reciprocated by pinions 75, 76 mounted on and fixed to the shafts 63,

and 58-59`of the bell-crank brackets are `connected by a` transverse connecting rod 7 7 (see Figs. 9 and 11)` passing through said brackets and threaded on its ends and secured by nuts 7 8.` Rollers 79 are. journaled on end portions of the connectingrods 77 and ride on upper faces of the racks 7 8, 7 et and prevent upward movement of said racks, and said rollers are held against longitudinal movement on the connecting rods by loose engagement with the linner faces of the bell-crank brackets and with yshoulders 80 formed on the connecting rods.

Tubular cores 81 (particularly see Figs.

`7 and 8) are provided and adapted to lie side by side and spaced apart in the mold compartments in a common manner. The cores 81, which preferably are elliptical vin cross-section and taper slightly toward their inner ends, are formed at their outer ends withinturned lugs 82adapted to be secured by cap Iscrews 83` to the vertical arms 72 of the core-carrying frames. 1t is to be understood that other forms of cores (not shown) may be interchangeably used with those here shown., if desired, and may be secured by the cap screws 83 at various` elevations on the vertical arms 72 tosuit the thickness of block or slab to be molded. l

The inner ends ofthe horizontal. arms of the bell-crankbrackets 56, 57, 58, 59 are formed with inwardly projecting studs 84. Mold face plates 85 (particularly seeFigs; 19, 20 and 25)]:are provided, one for each mold compartment, and are adapted to rest on and be supported by the horizontal arms of the bellscrank brackets 56-57 and 58-59 Each face plate 85 is formed at its inner margin with downwardly projecting apertured lugs 86 adapted to engage and be held by the studs 84. Downwardly projecting lugs 85a are formed on the lower nntrginal portions of the face plates 85 and are adaptto fit within notches 87 (Fig. 10) formed in the base portions of the vertical arms of the bell-cranks 56, 57, 58, 59, to assist in holding said face plates in position. The vertical arms of the bell-crank brackets also are formed with other notches 88 spaced throughout their length to receive the lugs 85EL of the face plates when in other positions as hereinafter more fully to be described. The central portions of the inner margins of the face plates 85 may be supported by lugs 4451 formed on the lower margin of the center board 441 (see Fig. 26).

Mold end plates 89 are provided (Figs. 22 and `2.3), two for each mold compartment, and each of said endplates is formed at its upper margin with an outwardly projecting fiange 90 adapted to overlie the top of va mold head 36 or 37, and apertured to receive an upstanding stud 91 (Fig. t) thereon. Each end plate 89 also is formed on its outer face with an outwardly projecting lug 92 adapted to engage in a vertical' slot 93 formed in the mold heads. Thus "the end plates 89'are held in position on the inner faces of the mold heads 86, 87, two of said end plates for each of said mold heads, separated by the center board 44. `When blocks or slabs of varying thick", ness are to be molded as more fully de scribed hereinafter', end plates of varying heights may be employed, the lugs 92 thereon occupying varying positions in the slots 93 as the occasion demands.

Pallets 9st are provided in any desired number and one of said pallets is mounted against the inner face of the vertical arms of each set 56-57, 58 59 of bell-crank brackets, said 'pallets being formed with spaced apertures through which the cores 81 project. The pallets 94 also preferably are formed on their rear faces with longitudinal strengthening ribs 96 extending between the bell-crank brackets. .The lower margins of the pallets 94 are supported, when in position, by upwardly projecting spaced lugs 97 formed on the outer margins of the face plates 85.

Hooks 98. 99 are formed on and project longitudinally from the outer margin of the top of the mold head 36, and similar hooks 100, 101 are formed on the mold head 37, and said hooks are adapted, when the machine is closed, to engage upper portions of the .vertical arms of the bell-crank brackets 56, 58, 57, 59 respectively, and hold said brackets, and the mold members carried thereby, in closed position.

In practical use of the machine and devices thus far described the machine is operated to closed position to form two identical mold compartments, one on each side of the center board 44, each having its face plate 85 forming the bottom of the mold compartment, its end plates 89 forming the ends of the mold compartments, and its pallet 94 forming the outer wall of the mold compartment, opposite to the center board 44, said compartments being open at their tops. The positions of the parts in such arrangement is shown in Figs. 1y to 5 inclusive, the cores 81 occupying positions transversely of the mold compartments between the pallet 94 and center board 44. Concrete is placed in the mold compartments and tamped in the common or any suitable manner to form blocks. It is to be understood, of course, that if desired any suitable designs may be formed on the faces of the face plates. 85 and end plates 89 to form the desired designs on the faces and ends of the molded blocks, certain of such designs being shown, by way of illustration, as applied to special face plates 85h, 850, in Figs. 30 and 31, to represent imitation rock face and panel effects. Certain end plates lmay be formed with half cores 102 (left side Fig. 4, and Fig. 6), corresponding to the cores 81, to form suitable hollows in the ends of the molded blocks; or such half cores may be omitted as shown at the right of Fig. 4 and in the detail in Fig. 22. Thus panel or rock face or other eEects may be given to the faces and ends of the blocks, or any ornamental and artistic effects be produced in a common and well known manner; such operation being rendered easy by reason of molding the blocks facedown in the molds.

TWhen the blocks have been molded, tamped and screeded or troweled, by hand or machinery, the molds may be opened by loperation of the lever 35 through an arc to oscillate the rock shaft 34 away from the center of the machine through approximately half a revolution. As the centraly quadrant gear 43 normally is in mesh with the vertical rack 55, the first effect of such movement is toA cause an upward movement of the said rack 55 in its guide bearings, and an upward movement of the inner ends of the toggle arms 52,- 53. This causes an inward pull on the toggle arms 52, 53 and eX- erts an inward pull on the lower ends of the operating levers 38, through the rods 50` 51, and said operating levers oscillate on their pivots and the upper ends are swung outwardly, carrying with them the mold heads 36, 37 and disengaging the hooks 98, 99, 100, 101 from the upper ends of the bell-crank brackets. In this manner the mold heads, and with them the end plates 89 of the molds, are first thrown to open position and completes* the movement above described, the

quadrant gears 41, 42, having been moved toward the center of the machine by oscillation of the rock shaft 34, come into engagement with the vertical racks 46 of the center board, and thereupon, through further oscillation of said shaft, cause an upward movement of said racks and the center board 44, which movesupwardly between and frees itself from the molded blocks. As the arms 45 of the center board 44-are connected by the links 61 to the horizontal arms of the bell-crank brackets 56, 57, 58, 59, upward movement of the' center board results'in an upward pull on said horizontal arms, and a rocking of said bell-'crank brackets on their pivots; and such movement is continued throughout approximately a quarter revolution, until the parts occupy substantially they positions indicated by dotted lines in Fig. 1. In this position the pallets 94 have been swung outwardly away from the center of the machine and are substantially horizontal and the face plates 85 substantially vertical, the molded blocks resting on the pallets and beingbacked by the face plates. Meantime, during such operation and because of the pivotal outward and downward movement of the bell-crank brackets, the pinions 67, 68 have come into engagement with the arcuate racks 69, 70 and been rotated by such engagement and movement, thus rotating the shafts 63, 64, and the pinions 7 5, 76 thereon. This rotation of the pinions has the effect of reciprocating the racks 7 3', 74 outwardly, and also the core-carrying frame, thereby 'withdrawing from the molded blocks the cores 81, through the pallets 94. The completed blocks are' thus delii'fered free at the sides of the machineand may be carried away on the pallets 94 and set aside for hardening and curing.

To close the machine for molding other and further blocks the handle 35 is moved back to original position and the parts are returned by the reverse of the operation above described, and in the reverse order. That is to say, the center board 44 is first moved downwardly' and the bell-crank brackets andmembers carried thereby oscillated to normal closed positions, and thereafter the mold heads 36, 37 are moved inwardly to closing positions, the hooks 98, 99, 100, 101 rengaging the upper ends of the arms of the bell-crank brackets and holding the parts in closed position. y

Provision is made for withdrawing the cores 81 fromr the mold compartments at times independently of the opening operation of the machine, and this is' accomplished soy for thepurpose may beformed of a plain rkwooden board, such ask 110, dotted lines Fig.

10. `Tlhis obviates the` necessity, in molding a large quantity of blocks, of providing a large number Aof the special and rather expensive mold pallets 94. For the purpose ofeffecting the transfer of the molded block from the mold pallet to the, transfer pallet a special attachment isfprovided for the machine, such as is shown in Figs. 1, and 10 to 13 inclusive. This attachment may be employed or not as desired, and is therefore not shown inany of the general views excepting Fig. 1. In this construction stub shafts 103 are journaled in the vupper ends of the vertical arms of the bell-crank brackets 56, 57, 58, 59, for rotation on horizontal axes,` and areheld by cotter pins 104 placed therethrough outside of said vertical arms, the .shaft--,preferably being formed with a shoulder contacting with the inner face of the vertical arm. A transfer device is formed with a vertical arm 105 j ournaled in a vertical hole or bearing inthe inner end of the stub shaft 103 `and withia horizontal arm 106 extending parallel withiand above the top of the adjacentmold head 36er 37, when the parts are in normalpositions. The horizontal arm 106 is offset outwardlyfrom theverticalplaneof' the vertical arm 105, as clearly shown in Fig. 12, so thatthe said horizontal arm may be in the same vertical plane as the adjacent wall of the mold compartment. The lower portion of the verticaly arm 105 is formed with a circumferential groove 107 (Fig. 13) adapted to be engaged by the end of a set screw 108 seated in the stub shaft 103,-to prevent vertical movement of said arm and permit rotary movement in itsbearing, on a vertical axis. The horizontal arms` 106 of the transfer devices may be swung outwardly through arcs as indicated -zby arrows in Fig. 11, the vertical arms swiveling in their bearings in the stub shafts.; A spring 109 is coiled around the vertical arm 105 and engages at one endy the stub shaft 103 and at its opposite end the horizontalarm 106, and tendsgto `hold and return said horizontal arinflto"` the position shown andy described. yThe horizontal arms 106 are thus yieldingly held in normal positions;r and maybe swung aside through arcs tovpfermit the troweling tool or other devicesfto passfreelyover the top of the mold compartments. In ypractical use ofthe transfer devicesa transfer pallet 110 may be introduced above each mold compartment and beneath the horizontal arms 106 of the transfer devices, or may be placed in such position after the machine has been opened as above described, to deliver the molded blocks. A further quarter turn may then be given to the transfer arms 106 and transfer pallets 110 (and with them the molded blocks), by causing the stub shafts 103 to articulate in their bearings in the bell brackets, where` upon the completed blocks will rest onthe transfer pallets and may be carried away thereon.

At times it is desirable to employ the machine for molding fractional blocks or a number of blocks separated by vertical partitions or dividing plates 111 (Fig. 11) said partitions being coincident with the axes of the cores-'81, and attached thereto. In such event a special form of pallet or stripping plate is required, and such device is shown in Figs. 27, 28 and 29. In this construction the pallet body 94- is formed with vertical slots 112 for the partitions or dividing plates 111, said slots extending on opposite sides of the core apertures 95a. As the partitions 111, and consequently the slots 112, must extend entirely to the top and bottom ofthe mold compartment in order to entirely separate the blocks, it is necessary, in order to prevent complete division of the pallet body 94a, to provide connecting means for the various parts thereof as separated by said slots. This is eifected by a rearwardly extending iiange 113 at the upper margin of the pallet body, and the slots 112 extend through said flange. A cross-head 1.14 is formed on and above the rear portion of the flange 113 and serves to connect the separated portions of said iiange and of the pallet body. The cross-head 114 lies entirely above the horizontal plane of the top of the pallet body, to permit withdrawal of the core blades or partitions 111, and entirely to the rear of the vertical plane of the pallet body to prevent interference with tamping or troweling tools when desired for use relative to the mold compartments. The cross-head 114 preferably is notched or cut away at its ends, and does not extend entirely to either end of the pallet 94, to permit free use of the transfer arms and devices 106 previously described. With the use of the above described devices quarter, half, three-quarter or other fractional blocks may be molded in the machine, several at a timein each mold compartment, the number and location of the blades or partitions 111 being varied to suit the size of the blocksy desired. i

It is also desirable to provide means for molding slabs or blocks varying in thickness, and having a lesser thickness than the this purpose it is necessary to provide means for elevating the face plate 85 in the mold lar to the studs 841 of the bell-crank brackets,

for engagement by the apertured ylugs S6 of the face plates. The spacing `brackets 115 may be provided in varying thicknesses to elevate the face plates the required eX- tent for making the desired thickness of4 block or slab.

It also is desirable to provide for making brick with the machine and to that end devices shown in Figs. 14,115, 16 and 21 are employed. In this construction the cores 81 are omitted and dividing plates 116 are ymounted relatively close together and secured at their outer ends to a .cross-head 117, on end portions of which are formed racks 118 similar to and having the same functions as the racks 73, 74 previously described relative to the core-carrying frame. For making regulation size brick six of the partitions or dividing plates 1,16 may be employed in each mold compartment, thereby making it possible to mold seven brick in the space devoted to a block of standard size. For making brick the face plates of the mold must be elevated as hereinbefore described, byA using spacing brackets S5. In making brick, also, a special pallet or stripping plate must be employed, shown in Fig. 16. This pallet, which is formed similar to the pallet 9a for a similar reason, has a body 119 formed with vertical slot-s 120 for the partitions 11G and having an offset connecting cross-head 121. A special face plate (Fig. 21) is also employed, designated by the numeral 122, and having shallow grooves 123 thereacross to receive the lower margins of and steady and guide the partitions or dividing plates A suitable casing or housing (not shown) may be formed between and inclosing the space occupied by the machine heads 30, 31, if desired, to protect the gears and other members from foreign elements, in a manner common in such machines. f

I claim as my invention- 1. A machine of the class described, comprising a frame, mold heads oppositely arranged thereon and pivoted for movement in opposite directions, a center board mounted for vertical movement between said mold heads, mold carrying members pivoted at opposite ends of said mold heads and movable iny opposite directions, a rock shaft journaled in the frame, and connections between said rock shaft and said movable members.

2. A machine of the class described, comprising a frame, mold heads oppositely arranged thereon and pivoted for movement in opposite directions, a center board mo-unted for vertical movement between said mold heads, mold carrying members pivoted at opposite ends of said mold heads and movable in opposite directions, means on end portions of said mold heads for engagement with said mold carrying members, a rock shaft journaled in the frame, and operative connections between said rock shaft and said movable members.

3. A machine of the class described, comprising spaced machine heads, mold heads pivoted to the tops thereof, a center board vertically movable between central portions of said mold heads, mold-carrying members pivoted between end portions of said machine heads and adapted to oscillate toward and away from said center board, a rock s raft journaled in said machine heads, gears on said rock shaft, and means connected with said mold heads and also with said center board for moving said members when said shaft is rocked.

4. A machine of the class described, comprising spaced machine heads, mold heads pivoted to said machine heads for movement in opposite directions, a center board vertically movable between central portions of said mold heads, mold carrying members pivoted between end portions of said machine heads and adapted to be oscillated away vfrom said center board, a rock shaft journaled in said machine head-s, gears on said rock shaft, and means connected with said mold heads and also with said center board and mold-carrying members for moving said members at differentV times when said rock shaft is oscillated.

5. A machine of the class described, comprising a frame, mold heads pivoted thereon and movable in opposite directions, a center board vertically movable and mounted between said mold heads, mold-carrying members pivoted at opposite side-s of said frame and movable away from said center board, a rock shaft journaled in t-he frame, toggle arms connecting said mold heads, meansconnected with said rock shaft for operating said toggle to oscillate said mold heads, and means connected with said rock shaft for moving said center board subsequent to oscillation of said mold heads.

6. A machine'of the class described, comprising a frame, mold heads pivoted thereon and conjunctively movable in opposite directions, toggle arms pivotally connecting said mold heads, a center board vertically movwir:

'ablebctween said mold heads, mold-carrying `members pivoted at opposite sides of said frame and movable `away from said center board, `pivotal connections between said center board and the mold-carrying members, a roclr shaftL journaled yin the frame, kmeans connected with the rock shaft for operating said toggle to oscillate the mold heads, and means connected with therock shaft for subsequently moving said center board and oscillating `said mold-carrying members.

7. A machine of the class described, comprising a frame, mold heads pivoted thereon and movable in opposite directions, a center board vertically movable between said mold heads, mold carrying members pivoted at opposite sides of said frame and movable away from said center board, said mold heads being pivotally connected by toggle members, core frames slidingly mounted in said mold-carrying members and carrying cores normally extending to said center board, a rock shaft journaled in the frame, means connected with said rock shaft for operating said toggle and oscillating said mold heads, means connected with said rock shaft for subsequently moving said center board and, oscillating said mold-carrying members, and means on the frame for reciprocating and withdrawing said core-carrying frames during oscillation of said mold -carrying members.

8. A machine of the class described, comprising a frame, mold heads pivoted thereon and movable in opposite directions, a center board vertically movable and mounted between said mold heads, mold-carrying members pivoted at opposite sides of said frame and movable away from said center board, core frames slidingly mounted in said moldcarrying members and having cores extending toward said center board, said core frames being provided with racks engaged by pinions suitably mounted for rotation, a rock shaft in the frame, means connected with said rock shaft for oscillating said mold heads, means connected with said shaft for subsequently moving said center board and oscillating said mold-carrying members, and larcuate racks on said frame for engage ment by pinions on said moldcarrying frames, during oscillation 'of the latter, for reciprocating said core frames.

9. A machine ofthe class described, comprising a frame, mold heads pivoted at opposite ends thereof for movement in opposite directions, a rack connected to said mold heads, a center board movable vertically between said mold heads, said center board being formed with downwardly extending racks, mold e carrying members pivoted at opposite sides of said frame and movable away from said center board, pivotal connections between said center board and mold-carrying members, a shaft journaled for rotation in thc frame, and spaced Lquadrant gears on said shaft adapted for respectively engaging, at intervals during oscillation of said shaft, the rack connected to said mold heads and the rack formed on said center board.

10. A machine of the class described, comprising a frame, mold heads pivoted at opposite ends thereof for movement in opposite directions, arms on said mold heads, toggle arms pivotally connecting the arms of said mold heads, a rack operating in connection with said toggle arms, a center board mounted between said mold heads and vertically movable, a rack connected thereto, a rock shaft journaled in the frame, mutilated gears on and circumferentially spaced relative to each other on said shaft, said gears being adapted for respectively engaging and operating the above mentioned racks, and means for rocking said shaft.

ll. A machine of the class described, comprising a frame, a mold carrying member pivoted for outward and downward movement on said frame, a shaft journaled in the outer end of said mold-carrying mem-l ber, a pinion on said shaft, an arcuate rack projecting from said frame and adapted for engagement by said pinion during oscillation of said mold-carrying member, a core frame mounted for reciprocation in said moldcarrying member, a rack fixed to said core frame, and a pinion on said shaft engaging said rack.

l2. A machine of the class described, comprising a frame, mold heads oppositely arranged and pivoted thereon for movement in opposite directions, a center board mounted for vertical movement between said mold heads, mold-carrying members pivoted on opposite sides of said frame and movable in opposite directions, pivotal connections between said center board and mold-carrying members, operating levers on said mold heads extending downwardly and a toggle device mounted between and pivotally connecting and adapted to lock the lower ends ofsaid operating levers in separate positions, and means on said mold heads'for engaging said mold-carrying members and holding the same in closed position.

13. A machine of the class described, com# prising a frame, mold heads oppositely arranged and pivoted thereon for movement in opposite directions, a center board mounted for vertical movement betweeny said mold heads, mold-carrying members pivoted on opposite sides of said frame and movable in opposite directions, pivotal connections between the center board and said mold-carrying members, means for operating said members to and from closed position, and

means for locking said members in closed position.

14. A machine of the class described, comprising a frame, mold heads oppositely arranged and pivoted thereon for movement in opposite directions, a center board vertically movable between said mold heads, mold-carrying members pivoted on opposite sides of said frame yand movable in opposite directions, pivotal connections between the center board and said mold-carrying members, means for operating said 10 members to and from closed position, and means on said mold heads for engaging said mold-carrying members and locking the machine in closed position.

Signedby me at Des Moines, Iowa, this 15 18th day of July, 1916.

FRANK H. FoLDnN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D.' C. 

